JP2011111695A - Fibrous cloth having allergen-decreasing function, and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve an allergen-decreasing function of persimmon tannin further and make it have an excellent light fastness, since by a conventional method for only fixing the persimmon tannin, only a certain degree of allergen-reducing function is obtained and also there are problems of being inferior in the light fastness, etc. <P>SOLUTION: The allergen-decreasing function can be improved more than those of conventional ones and the fibrous cloth is made to have an excellent light fastness by treating the fibrous cloth with a processing agent containing the persimmon tannin and a chelating agent, and made as having pH 5 to 11 by a pH-adjusting agent. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique in which an astringent astringency derived from nature is fixed to a fiber fabric to provide an allergen reducing function. In particular, it is used for interior products such as wallpaper, warmth, table and chair covers, curtains, carpets, etc., to reduce indoor allergens.

  In recent years, due to the high airtightness of houses, the so-called odor and house dust has become a house with a structure that tends to be trapped indoors. It is said that many symptoms of allergic diseases such as allergic rhinitis have developed.

  There are various types of allergens, including mites (parasites, carcasses, shells, feces), molds, pets (hair, dandruff), pollen, and the like, which are considered as the main causative agents of allergic diseases. As countermeasures against these allergens, methods are disclosed in which allergens are prevented from entering the room, allergens that have entered are removed, or inactivated.

  For example, deodorization, deodorization, and dust collection using an air conditioner, an air purifier, and the like are performed, and a method for collecting allergens in the air using a filter or the like has been proposed. However, these methods are effective for causative substances of allergic diseases floating in the indoor air, but they are also effective for causative substances on the surface of floors, walls, sofas, chairs, etc. There is no.

  In addition, in the patent document 1, the applicant discloses a wallpaper having an allergen-reducing function in which the surface layer of a woven or knitted fabric made of cellulosic fibers is coated with astringency.

Japanese Patent Application No. 2008-232226

  However, although the above-mentioned wallpaper has a certain allergen reducing function, it is inferior in light resistance and has a problem as a product. Further, the allergen reducing ability is not always satisfactory, and further improvement of the ability has been demanded. This invention makes it a subject to improve the allergen reduction capability of persimmon and to provide the fiber fabric which has the outstanding light resistance, and its manufacturing method.

  The present invention provides the following means in order to achieve the above object.

  [1] A fiber fabric having an allergen-reducing function, characterized in that the fiber fabric is treated with a processing agent containing astringent astringent and a chelating agent and adjusted to a pH of 5 to 11 with a pH adjuster.

[2] The fiber fabric having an allergen-reducing function as described in [1], wherein an application amount of the persimmon astringent fiber to the fiber fabric is 0.05 to 0.5 g / m ² .

  [3] A method for producing a fiber fabric having an allergen-reducing function, characterized in that the fiber fabric is treated with a processing agent containing astringent astringent and a chelating agent and adjusted to a pH of 5 to 11 with a pH adjuster.

  In the inventions of [1] and [3], the fiber fabric is treated with a processing agent that contains persimmon astringent and a chelating agent and is adjusted to a pH of 5 to 11 with a pH adjuster. There is an increase in OH groups, which acts on allergen proteins to improve the allergen-reducing function. Moreover, since the chelating agent is contained, the light fastness can be improved by coordinating the chelating agent to the color forming group producing the astringent color. Furthermore, if it is a fiber fabric containing natural fibers, it is easier to dye persimmon than synthetic fibers, and it is adjusted with a pH adjuster, so it can be colored more deeply with a small amount of persimmon, and has antibacterial performance and allergen reduction function At the same time. Moreover, the persimmon astringent is effective also for the pollen allergen which floated in the air and entered the room, and can reduce the allergen which contacted the fiber cloth by the air flow in the room.

In the invention of [2], since the amount of the astringent astringent extract fixed to the fiber fabric is 0.05 to 0.5 g / m ² , it exhibits a sufficient allergen reducing function while taking advantage of the texture of the fiber fabric. can do.

  The present invention will be described in more detail below. In the present invention, a natural astringency astringent is fixed to a fiber fabric to give an allergen reducing function.

  As the fiber fabric containing natural fibers, it is preferable to use a fiber fabric made of cellulose fibers such as cotton, hemp, rayon, natural pulp, etc., which are easily dyed with astringency, and the form thereof is paper-like, non-woven fabric such as felt, , Woven fabric, knitted fabric and the like are not particularly limited.

  Persimmon astringent is a reddish brown translucent liquid containing fermented sap obtained by crushing and squeezing the fruit of persimmon, containing a large amount of tannin and sibuol, and having an odor of acetic acid and butyric acid produced by fermentation. It has been used for a long time as an agent and a reinforcing agent for increasing strength. In recent research, it has been found that it is also used as a dye and paint, and has an action of reducing formaldehyde, reducing allergens (especially cedar pollen, mite allergen) and antiviral properties. Moreover, it is preferable to apply an odorless type of astringency from which odors have been removed to those used indoors as in the present invention.

  By making the processing agent containing persimmon astringent and a chelating agent into a pH of 5 to 11 with a pH adjuster, the molecular weight of persimmon astringent is promoted, the —OH group of persimmon astringent increases, and the —OH group acts on the allergen protein. Thus, the allergen reducing function can be improved. Moreover, when the molecular weight of persimmon astringent is promoted, persimmon astringent can be easily dyed into natural fibers and can be dyed deeply. In particular, pH 9 to 11 is preferred because it dyes darkly at pH 9 or higher and stops dyeing deeply at about pH 11.

  As the pH adjuster, for example, ammonia, trimethylamine or the like that does not remain in the fiber fabric as a solid after drying is preferable, and NaOH, KOH, or the like is not preferable.

  The chelating agent sandwiches metal ions and inactivates the ions, and examples thereof include EDTA, sodium hexametaphosphate, N, N-di (2-hydroxyethyl) granine, sodium citrate and the like. The processing agent containing a chelating agent is used in the present invention in order to prevent the light fastness of the fiber fabric dyed with astringency by reducing the pH to 5 to 11 with a pH adjuster. When the chelating agent inactivates the ions, the astringent chromophore is prevented from being decomposed by ultraviolet rays, and light fastness can be improved. In order to improve the light fastness, a method of adding an ultraviolet absorber is also conceivable. However, since the ultraviolet absorption region of astringency is wide at 400 nm or less, a plurality of ultraviolet absorbers must be added, so that the cost is reduced. It will be expensive.

It is preferable that the sticking amount of the persimmon to the fiber fabric is 0.05 to 0.5 g / m ² . If it is less than 0.05 g / m ² , a fiber fabric having sufficient antibacterial, deodorant, and allergen reducing functions cannot be obtained. Moreover, even if it applies exceeding 0.5 g / m < ² >, the effect commensurate with the increase in the amount of application is not obtained only by increasing the amount of application. A more preferable sticking amount of the persimmon astringent is 0.1 to 0.3 g / m ² .

  A method for fixing the processing agent containing astringent astringent and a chelating agent to the fiber fabric is not particularly limited, but an immersion method is common. Examples of other methods include gravure roll processing, spray processing, roll coater processing, jet print processing, transfer print processing, and screen print processing.

  Next, the present invention will be described specifically by way of examples. In addition, evaluation of each allergen reduction performance (inactivation performance) in an Example was performed as follows.

<Allergen reduction performance test>
Measure the ELISA sandwich method, read the absorbance of the generated chromogenic substance with an absorptiometer, quantify the amount of allergen in the sample from a standard curve created using a standard product of known concentration, and reduce the allergen Was calculated and evaluated in the following four stages, and evaluations “1” and “2” were regarded as acceptable.
(Criteria)
“1” ・ ・ There is no allergen contamination. (Allergen reduction rate of 80% or more)
"2" ... Slightly contaminated with allergens. (Allergen reduction rate of 60% or more and less than 80%)
"3" ... contaminated with allergens. (Allergen reduction rate of 40% or more and less than 60%)
"4" ... Very contaminated with allergens. (Allergen reduction rate less than 40%)

<Light fastness>
It measured based on Jis L-0842 method. The evaluation is based on 1 to 5 grades, and the higher the numerical value, the better the light fastness.

<Example 1>
Cotton fabric (4 weft plain weave) is used as a fiber fabric, powdery astringent astringent, hexametaphosphate sodium as a chelating agent, ammonia as a pH adjuster, and the composition shown in Table 1 for 100 parts by weight of astringent astringent In addition to water, the mixture was sufficiently dispersed and stirred until it was uniformly dispersed to obtain an aqueous processing agent solution having a pH of 9. Next, the cotton cloth was immersed, squeezed with a mangle, and dried at 60 ° C. for 10 minutes to obtain a fiber cloth. The sticking amount of the persimmon to the fiber fabric was 0.3 g / m ² . The fiber fabric thus obtained had an allergen reduction performance of “1” and a light fastness of “4th grade”.

<Examples 2 to 6>
A fiber fabric was obtained in the same manner as in Example 1 except that the blending ratio shown in Table 1 was used. Table 1 shows the evaluation of the allergen-reducing performance and light fastness of the allergen-reduced fiber fabric thus obtained.

<Comparative Examples 1-4>
A fiber fabric was obtained in the same manner as in Example 1 except that the formulation shown in Table 1 was used. Table 1 shows the evaluation of the allergen-reducing performance and light fastness of the allergen-reduced fiber fabric thus obtained.

  As shown in Table 1, Comparative Example 1 with a large amount of sticking of persimmons failed in light fastness, and Comparative Example 2 with a small amount of fixing of persimmons failed in allergen reduction performance. Further, in Comparative Example 3 in which no chelating agent was blended, the light fastness was not acceptable, and in Comparative Example 4 in which the pH value was 4.5, the allergen reducing performance was unacceptable.

  The technology of the present invention is to insulate allergens by adhering astringency to the fiber fabric, and the field used is not limited to interior products used indoors, but is a technology for imparting functionality to textile products. Can be widely used.

Claims (3)

  A fiber fabric having an allergen-reducing function, characterized in that the fiber fabric is treated with a processing agent containing astringent astringent and a chelating agent and adjusted to a pH of 5 to 11 with a pH adjuster. ^{2. The} fiber fabric having an allergen-reducing function according to claim 1, wherein an application amount of the persimmon astringent fiber fabric is 0.05 to 0.5 g / m < ² >.   A method for producing a fiber fabric having an allergen-reducing function, characterized in that the fiber fabric is treated with a processing agent containing astringent astringent and a chelating agent and adjusted to a pH of 5 to 11 with a pH adjuster.